Add ClawPort logo to repo and README

Optimized 256x256 PNG (22KB) displayed in README header and included
in npm package files. Also used as default sidebar icon in the dashboard.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -1,5 +1,7 @@
 <div align="center">
 
+<img src="clawport-logo.png" alt="ClawPort" width="160" />
+
 # ClawPort
 
 **A visual command centre for your AI agent team.**

package.json

@@ -25,6 +25,7 @@
   "files": [
     "app/",
     "bin/",
+    "clawport-logo.png",
     "components/",
     "docs/",
     "lib/",